Vehicle rear structure

Abstract

A vehicle rear structure includes: a rear sideframe disposed on either side in a rear of a vehicle body; and a rear subframe disposed under the rear sideframe, wherein a rear end of the rear subframe is disposed at the same position in the longitudinal direction as, or at a position posterior to, a rear end of the rear sideframe. The vehicle rear structure has better performance in transmitting an impact load at a rear impact with a vehicle than ever, to further improve performance in absorbing impact energy.

The invention claimed is: 
     
       1. A vehicle rear structure comprising:
 a rear sideframe disposed on either side in a rear of a vehicle body; and 
 a rear subframe disposed under the rear sideframe, 
 wherein a rear end of the rear subframe is disposed at a position posterior to a rear end of the rear sideframe, 
 the rear subframe includes a pair of side members and a rear member joining the pair of the side members to each other, 
 a rear end of the rear member, formed to be convex rearward, is positioned posterior to rear ends of the pair of the side members, 
 the rear sideframe includes a first front-rear portion extending in a vehicle longitudinal direction, and a first inclined portion extending frontward from a front end of the first front-rear portion at an angle so as to be gradually displaced more outward in a vehicle width direction with an increasing distance from the front end of the first front-rear portion, 
 the rear subframe includes a second front-rear portion extending in a vehicle longitudinal direction, and a second inclined portion extending frontward from a front end of the second front-rear portion at an angle, so as to be gradually displaced more outward in the vehicle width direction with an increasing distance from the front end of the second front-rear portion, and being integrally joined to the second front-rear portion, 
 the second inclined portion is connected to the rear sideframe, and 
 the second front-rear portion extends along the first front-rear portion, and the second inclined portion extends along the first inclined portion, in a bottom view of the vehicle body. 
 
     
     
       2. The vehicle rear structure according to  claim 1 , wherein
 the second front-rear portion is joined to the first front-rear portion, and 
 the second inclined portion is joined to the first inclined portion. 
 
     
     
       3. The vehicle rear structure according to  claim 2 , comprising:
 a side sill disposed on either side of the vehicle body, 
 wherein the rear sideframe has a front end of the first inclined portion joined to a rear end of the side sill, and has the first front-rear portion disposed at a higher level than the side sill, in a side view of the vehicle body, and 
 the second front-rear portion and the second inclined portion are disposed at the same height as the side sill, in a side view of the vehicle body. 
 
     
     
       4. The vehicle rear structure according to  claim 2 , wherein
 the second front-rear portion and the second inclined portion of the rear subframe, which are integrally joined to each other, form a side member, and 
 the side member has a front portion thereof joined to the rear sideframe, and has a rear end thereof disposed at the same position in the longitudinal direction as, or at a position posterior to, a rear end of the rear sideframe. 
 
     
     
       5. The vehicle rear structure according to  claim 1 , wherein
 the rear member is formed with a mount portion to have a drive unit mounted thereon, and 
 the mount portion is positioned posterior to the rear ends of the side members.